Actionpoll is a simple PHP script which provides the standard functionality such as unlimited options, IP tracking of users, easy installation, and HTML and WML output. An event can be triggered if a certain number of votes is reached. Surveys can be stored either in a MySQL database or in text files.

AdaCGI is an Ada95 interface to the "Common Gateway Interface" (CGI). AdaCGI makes it easier to create Ada95 programs that can be invoked by World Wide Web (WWW) HTTP servers using the standard CGI interface. Using it, you can create Web applications using Ada95 to perform queries or other processing by request from a WWW user.

adept is a system for developing short courses for users needing to learn specific skills or knowledge. adept provides JIT ("just in time") learning, in contrast to the more usual "just in case" learning. It can be used as an intranet application to propagate knowledge to employees, or to educate customers via your homepage.

ADODB is a set of advanced PHP database
abstraction classes. It supports MySQL,
PostgreSQL, Interbase/Firebird, Informix, Sybase
SQL Anywhere, Oracle, MS SQL 7 and 2000, SAP DB,
Sybase, DB2, FrontBase, Foxpro, Access, Netezza,
LDAP, ODBTP, ADO, and generic ODBC. A metatype
system is built in, making it possible to figure
out that types such as CHAR, TEXT, and STRING are
equivalent in different databases. It also
features portable database creation,
database-backed session support (with encryption),
SQL performance monitoring, and database health
checks.

Agora is a Web-based, threaded discussion tool, similar to Usenet newsgroups.
Agora remembers each user's preferences, and allows threaded, unread-only
browsing. It offers the ability to manage several different groups, with
different themes, forums, and administrators for each group. Agora offers a
basic Web-based ICQ client, as well as a Web-based notes system.

Interchange is an advanced e-commerce platform. It enables you to build completely customized and flexible online shops, while utilizing the knowledge gathered in more than a decade of active development. It offers high level e-commerce functions, support for PostgreSQL, MySQL, and Oracle, templating, a complete shopping cart functionality, payment processing, inventory, tax and shipping calculation, discounts, Web-based administration, localization, event routing, SOAP-based RPC, a custom tag language, and the full power of Perl.

album is a free HTML/XHTML photo album and gallery
generator that supports themes/skins. You can
choose different themes or write your own to get
different layouts and styles. It creates all your
thumbnails (including directory thumbnails) and
descends into directories so you can organize your
photos. See the home page for more examples. album
is also multi-lingual, with many languages being
added all the time. N.B.: The purchase link is
provided for donations; the software does not cost
anything.

Apache Jetspeed is an Enterprise Information Portal that allows users to aggregate and organize various information sources and present them in a multi-device, user-customizable Web interface. It integrates a simple syndication system based on OCS and RSS formats.

When building server side applications for the Web, independently of the language used (Java, PHP, Perl, etc), a lot of time is spent writing embedded HTML code and dealing with the fact that HTTP is a stateless protocol. SPFC allows you to write HTML forms like you write a Java GUI.

Apache::ASP provides an Active Server Pages port to the Apache Web Server with Perl as the host scripting language. Apache::ASP allows a developer to create dynamic Web applications with session management and embedded Perl code. There are also many powerful extensions, including XML taglibs, XSLT rendering, and new events not originally part of the ASP API.